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<head><meta charset="utf-8"><title>proc macro diagnostic · t-libs · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/219381-t-libs/index.html">t-libs</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/219381-t-libs/topic/proc.20macro.20diagnostic.html">proc macro diagnostic</a></h3>

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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/219381-t-libs/topic/proc%20macro%20diagnostic/near/227209563" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jacob Pratt <a href="https://rust-lang.github.io/zulip_archive/stream/219381-t-libs/topic/proc.20macro.20diagnostic.html#227209563">(Feb 22 2021 at 01:32)</a>:</h4>
<p>Per the <a href="https://rustc-dev-guide.rust-lang.org/stability.html#stabilizing-a-library-feature">library stabilization guidelines</a>, would someone mind kicking off an FCP on <a href="https://github.com/rust-lang/rust/issues/54140">proc macro diagnostics</a>, excluding warnings? I believe it's been around for long enough in its current form on nightly to be stabilized. Warnings should imo be excluded for now because of the unresolved issue regarding <code>#[allow]</code>ing them. The <code>Level</code> enum is already non-exhaustive, so gating the <code>Warning</code> variant wouldn't cause any forward-compatibility concerns.</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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